Aero Precision M4E1 Stripped Lower OD Green 5.56

Aero Precision M4E1 Features The Aero Precision M4E1 lower receiver offers several enhanced features including a threaded bolt catch roll pin for easy installation and an integrated trigger guard for added strength. The upper tension screw eliminates receiver wobble between the upper and lower. The increased magwell flare allows for faster reloads while the threaded takedown pin detent recess simplifies the assembly process. Additionally the lower is marked and milled to accept short-throw